| Abbreviation | Definition |
|---|---|
| MSR | Main Supply Route |
| MSR | Maritime Support Request |
| MSR | Military Supply Route |
| MSR | Mission Support Request |
| MSRA | Military Service Relief Act |
| MSRADS | Mobile Short Range Air Defense System |
| MSRC | Medical Mission Area Materiel Plan |
| MSRC | Military Suicide Research Consortium |
| MSRD | Military Strategy Resources Division |
| MSRON | Maritime Expeditionary Security Squadron |
| MSRR | Modeling and Simulation Resource Repository |
| MSRRA | Military Spouse Residency Relief Act |
| MSRRA | Military Spouses Residency Relief Act |
| MSRS | Materiel System Requirements Specification |
| MSRS | Military Service Recognition Scholarship |
| MSRT | Mobile Subscriber Radio Terminal |
| MSRT | Mobile Subscriber Receiver/ Transmitter |
| MSRT | Mobile Subscriber Receiver/Transmitter |
| MSRV | Message Switch Rekeying Variable |
| MSS | Manuscripts |